report finds that tsa really doesn't know how good the dogs are at tracking explosives in a dynamic environment where people are moving in all directions. the report finds that more than 700 canine units have been deployed without knowing their effectiveness. in addition, a report found that some dogs are not getting the required monthly training. >> they want to do the right thing. the homework hasn't been done. a lot of money gets spent before they know something works. >> reporter: in a statement, the tsa acknowledged that they're looking for ways to improve the assessments of how well the dogs are performing. >>> now, we're going to turn to the very latest twist in the manti te'o story and the elaborate love hoax. we're hearing more now from the man who duped the notre dame football star. ronaiah tuiasosopo is opening up about the relationship he had with te'o. abc's linsey davis has the details. >> reporter: in an exclusive interview with dr. phil, ronaiah tuiasosopo, the confessed mastermind behind the manti te'o girlfriend hoax, refused to re-create the female voice. >> i love you so muc